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Related Concept Videos

Glucose Transporters01:27

Glucose Transporters

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Glucose transporters facilitate the transport of glucose across the cell membrane. In addition to glucose, some glucose transporters can also aid the movement of other hexoses such as fructose, mannose, and galactose.
Facilitated diffusion-glucose transporters (GLUTs) are encoded by the solute-linked carrier (SLC) family 2, subfamily A gene family, or SLC2A. The 14 GLUT protein members are distributed into three classes:
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Phloem and Sugar Transport02:02

Phloem and Sugar Transport

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Like many living organisms, plants have tissues that specialize in specific plant functions. For example, shoots are well adapted to rapid growth, while roots are structured to acquire resources efficiently. However, sugar production is primarily restricted to the photosynthetic cells that reside in the leaves of angiosperm plants. Sugar and other resources are transported from photosynthetic tissues to other specialized tissues by a process called translocation.
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Secondary Active Transport01:32

Secondary Active Transport

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One example of how cells use the energy contained in electrochemical gradients is demonstrated by glucose transport into cells. The ion vital to this process is sodium (Na+), which is typically present in higher concentrations extracellularly than in the cytosol. Such a concentration difference is due, in part, to the action of an enzyme "pump" embedded in the cellular membrane that actively expels Na+ from a cell. Importantly, as this pump contributes to the high concentration of...
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Secondary Active Transport01:55

Secondary Active Transport

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One example of how cells use the energy contained in electrochemical gradients is demonstrated by glucose transport into cells. The ion vital to this process is sodium (Na+), which is typically present in higher concentrations extracellularly than in the cytosol. Such a concentration difference is due, in part, to the action of an enzyme “pump” embedded in the cellular membrane that actively expels Na+ from a cell. Importantly, as this pump contributes to the high concentration of...
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Glucose Absorption Into the Small Intestine01:26

Glucose Absorption Into the Small Intestine

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Complex carbohydrates consumed cannot be absorbed into the small intestine in their original form. First, they must be hydrolyzed to a monosaccharide form such as glucose or galactose. These monosaccharides are then transported across the intestinal membrane and into the blood via transcellular transport. The intestinal epithelial cells allow the movement of these monosaccharides with a defined 'entry' through membrane transporter proteins present on their apical membrane and...
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Carbohydrate Absorption01:25

Carbohydrate Absorption

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Carbohydrates are essential macronutrients that serve as the body's primary energy source. Their digestion begins in the mouth, where salivary amylase partially breaks down complex carbohydrates such as starch into smaller oligosaccharides. This mechanical and enzymatic activity prepares carbohydrates for further processing in the gastrointestinal tract.
After being swallowed, the partially digested carbohydrates mix with gastric secretions in the stomach. However, the acidic environment...
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Related Experiment Video

Updated: Oct 28, 2025

Author Spotlight: Streamlining Rice Breeding with CRISPR/Cas for Obtaining Optimal Phenotypic and Agronomic Traits
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Sucrose transporter in rice.

Yunfei Wu1, Wenchun Fang1, Wangmenghan Peng1

  • 1Jiangsu Key Laboratory of Crop Genetics and Physiology/Co-Innovation Center for Modern Production Technology of Grain Crops/Joint International Research Laboratory of Agriculture &agri-product Safety, Yangzhou University, Yangzhou, China.

Plant Signaling & Behavior
|July 16, 2021
PubMed
Summary

Understanding sugar transport in rice (Oryza sativa) reveals how sucrose transporters (OsSUTs and OsSWEETs) and transcription factors regulate crop biomass and architecture. This knowledge can enhance rice productivity.

Keywords:
Phloem loadingRegulatorRiceSucroseSucrose transportSucrose transporter

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Characterization of Membrane Transporters by Heterologous Expression in E. coli and Production of Membrane Vesicles
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Area of Science:

  • Plant Biology
  • Molecular Biology
  • Agricultural Science

Background:

  • Plant photosynthesis is crucial for crop development and biomass accumulation.
  • Carbohydrate partitioning, particularly sugar transport, influences plant architecture traits like height and panicle size in rice.
  • Phloem loading is a key process in sugar transport and warrants further investigation for crop improvement.

Purpose of the Study:

  • To summarize recent findings on phloem loading mechanisms involving sucrose transport in rice.
  • To highlight the roles of sucrose transporters (OsSUTs, OsSWEETs) and regulatory factors in rice.
  • To provide insights into improving rice productivity through understanding sugar transport.

Main Methods:

  • Literature review focusing on sucrose transport and phloem loading in rice.
  • Analysis of the roles of sucrose transporter genes (OsSUTs, OsSWEETs).
  • Examination of regulatory factors including transcription factors (OsDOF11, OsNF-YB1) and environmental influences (CO2, drought, temperature).

Main Results:

  • Sucrose transporters OsSUTs and OsSWEETs mediate sucrose import/export between phloem cells in rice.
  • Transcription factors like OsDOF11 and OsNF-YB1 regulate the expression of sucrose transporter genes.
  • Environmental factors significantly impact the transcription levels of sucrose transporter genes.

Conclusions:

  • Elucidating the phloem loading mechanism in rice is essential for understanding plant development.
  • Manipulation of sugar transport pathways holds potential for increasing rice crop productivity.
  • Further research is needed to fully understand the regulatory networks governing phloem loading.